diff options
| author | Venkatesh Pallipadi | 2009-02-25 02:35:14 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2009-02-25 13:09:52 +0100 |
| commit | 17581ad812a9abb0182260374ef2e52d4a808a64 (patch) | |
| tree | d105f3b5bffb879c57516d7a477e787104183d52 /include | |
| parent | gpu/drm, x86, PAT: routine to keep identity map in sync (diff) | |
| download | kernel-qcow2-linux-17581ad812a9abb0182260374ef2e52d4a808a64.tar.gz kernel-qcow2-linux-17581ad812a9abb0182260374ef2e52d4a808a64.tar.xz kernel-qcow2-linux-17581ad812a9abb0182260374ef2e52d4a808a64.zip | |
gpu/drm, x86, PAT: PAT support for io_mapping_*
Make io_mapping_create_wc and io_mapping_free go through PAT to make sure
that there are no memory type aliases.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Eric Anholt <eric@anholt.net>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/io-mapping.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h index cbc2f0cd631b..f1ed66c43787 100644 --- a/include/linux/io-mapping.h +++ b/include/linux/io-mapping.h @@ -49,8 +49,9 @@ static inline struct io_mapping * io_mapping_create_wc(resource_size_t base, unsigned long size) { struct io_mapping *iomap; + pgprot_t prot; - if (!is_io_mapping_possible(base, size)) + if (!reserve_io_memtype_wc(base, size, &prot)) return NULL; iomap = kmalloc(sizeof(*iomap), GFP_KERNEL); @@ -59,13 +60,14 @@ io_mapping_create_wc(resource_size_t base, unsigned long size) iomap->base = base; iomap->size = size; - iomap->prot = pgprot_writecombine(__pgprot(__PAGE_KERNEL)); + iomap->prot = prot; return iomap; } static inline void io_mapping_free(struct io_mapping *mapping) { + free_io_memtype(mapping->base, mapping->size); kfree(mapping); } |